Although unclear,it is believed that Alzheimer disease is caused by: (Select all that apply.)

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The cause of Alzheimer disease is still unclear,but protein deposits of amyloid have been found during the autopsy of the brains of patients with Alzheimer disease,as well as tangled neurofibers.In addition,a deficiency of acetylcholine exists.Lewy bodies are associated with another type of dementia,and small strokes are thought to be the cause of vascular dementia.

Although Unclear,it Is Believed That Alzheimer Disease Is Caused By